Geotagging your photos? Old hat -- Neurowear wants to geotag your mood. The folks that brought animated cat ears to the human race is now using NeuroSky's brainwave-reading headgear to suss out your emotional state and share it with your friends. We dropped in on the group at Tokyo Game Show to take a look at an early prototype. After strapping a familiar Mindwave mobile headset to this editor's skull, a companion iPhone app sprung to life, reading off relaxation levels and assigning cartoon faces to the user's mood....